Mechanical stoker



J. J. DERSOM.

MECHANICAL STOKER.

APPLICATION FILED MAY 15. 1920.

Patented July 4, 1922.

1 m mLgMIw/M E it? Fiei.

STTgg MECHANICAL STOKER.

Application filed May 15, 1920-.

To all whom it may concern:

Be it known that JOHN J. DnRsoM, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, has invented certain new and useful Improvements in Mechanical Stokers, of which the following is a specification. This invention relates to improvements in mechanical stokers of the type employed for the purpose of introducing coal or other fuel, into the fire box of a furnace;

The invention comprehends a stoker comprising a magazine or hopper overlying the lire box of a furnace, the open lower end of the magazine being separated from the fire box by a plurality of spaced walls, between which fuel from the magazine is permitted to pass and to be equally distributed over substantially the full area of the coal bed, the construction being such as to permitthe coal to fall evenly and uniformly upon the coal bed so that complete and uniform combustion thereof will take place, and in thismanner to prevent uneven combustionof the coal. due to the prior practice of introducing the coal into one end of the fire box.

The invention further consists in so forming the walls between the magazine and fire box that restricted fuel outlets will be provided for the magazine over the area of the fire box, said outlets communicating with the spaces formed between said walls, in order that the discharged fuel will be per mitted to pass into all of said spaces and to thence find its way in a uniformly distributed manner to the fire box, mechanically operated agitating means beingprovided in conjunction with certain of said: walls and beneath the magazine outlets, said" means serving to insure a passage of the fuel through said outlets and to alternatingly direct the same into d fferent passage ways or spaces formed between said walls.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention further consists inthe novel features of construction, combinations of elements and arrangements of parts, hereinafter to be fully described and to have the scope thereof pointed out in the appended claims.

V In the accompanying drawing, form nga part of this'specification, and in which simi- 1211? characters of reference denote like and Specification of Letters Patent.

Patented July t, 1922. Serial no. 381,714.

corresponding partsthroughout the several views of the drawing:

Figurelis a perspective view of a furnace equipped'with the improved stoking apparatus comprisingthe'present invention,

Figure 2 is a longitudinal vertical sectional view taken through the apparatus,

Flgllle 3 is a transverse vertical sectionalview, and

Figure 4 is a detail perspective view of one of the agitator members and its co-operative mounting.

' In carrying out the present invention, use may be made of a furnace 1. For purposes of illustration, the structure 1 may be said to consist of a setting 2, in which is formed the usual fire box 3,. grate mechanism 4 and ash pit 5-, the fire box 31 being accessiblein the usual manner by the ordinary hinged door 6'. The fire box 3 communicates at its rear end with a heat passageway 7, which leads to any suitable outlet.

The upper portion of the setting 1 is pro vided with a fuel receiving magazine or hopper 8, which comprises an open top and downwardly converging side walls 9, which extend toward the open lower end of the magazine, the lower end of the magazine 8, being substantially equal to the area of the fire box. Interp'osecl between the fire box and the lower end' of the magazine is a phr rality of vertically extending-walls 1.0 anda 10, which latter .a're disposed over the full area of the fire box and are suitably spacedto' provide fuel passageways 11 the latter being incommunication with the outlets of the magazine,.whereby coal discharged from said magazine will pass through the passageways 11 and be deposited upon the coal bed carried by the grate mechanism 4.

As will be observed upon reference to Figure 8, the walls 10 are higher than the inter vening walls 10, and these higher-walls have their upper edges provided with triangular outlet members 12, in the form ofelongated strips, and so disposed as to extend transversely of the setting. By theconstruction of the'meinbers 12, and their positions upon the walls 10, it will be manifest that a plurality of V shaped outlet openings 13 will be provided in the lower end of the magazine, through which outlets the coal will be en"- abled to pass on its way to thefire box. The walls 10 are positioned so as to lie immediately beneath the openings 18, and are pro vided with beveled upper ends, which termlnate in concaved longitudinally extending depressions 14. Oscillatably supported within the depressions 14 is a plurality of transversely extending agitator members 15. These members are in the form of bars and the ends of the members are equipped with journals 16, which are journaled within the walls of the setting 2. These journals are provided with fixed exteriorly disposed and depending crank arms 17. The lower ends of these crank arms are connected with longitudinally extending bars 18, which extend toward the forward end of the furnace and are provided in this instance with handles 19, by means of which the bars 18 may be manually reciprocated, a cross rod 20 being situated to connect the forward ends of the bars 18 so that the latter will reciprocate in unison.

In operation, coal or the like is introduced into the hopper or magazine 8, and it will be evident that this coal will then automatieally gravitate toward the outlet openings 13 provided in the lower end of said magazine. If the members 15 are in their normal flat horizontal positions, it will be manifest that the flow of the coal toward the fire box will be arrested, but upon reciprocating the bars 18, motion will be imparted to the arms 17 so that the agitator members willbe oscillated first in one direction and then in the other, assuming during such oscillation various inclined positions. Therefore, this movement of the agitator members causes the coal to pass through the openings 13 so that the same will be alternatingly directed into different passageways 11 formed between the walls 10 and 10.. When so introduced, the coal will pass from the pas-' sageways 11 onto the coal bed carried by the grate mechanism 1. The peculiar ad vantage of this construction is that the coal will be evenly distributed over the entire length and width of the fire box. This con struction, therefore, insures even combustion within the fire box, a maximum amount of heat in proportion to the fuel consumed and an appreciable diminution of smoke and analogous waste. It is obvious that in large installations, the bars 18 may be mechanically operatedinstead of manually.

l/Vhat is claimed is:

1. A stoker comprising a fuel receiving hopper arranged above the fire box of a furnace, a plurality of spaced stationary walls disposed between the lower end of said hopper and said fire box, said walls defining between them a plurality of fuel passageways arranged over the fire boX, outlets provided inthe bottom of said hopper and communicating with said passageways, and a plurality of movable agitator members positioned beneath said outlets and opcrating to effect the passage of the fuel from said outlets into alternate passageways.

2. In a furnace, a hopper carried by said furnace and disposed above the grate mechanism of the latter, a plurality of stationary vertical walls located within said furnace and situated between. the lower end of said hopper and the fire box ofthe furnace, said walls: being spaced to define a plurality of fuel passageways, means provided in the lower end of said hopper defin-.

ing a plurality of tapering outlets, said outlets being situated in staggered relationship with respect to said passageways and said passageways being disposed over substantially the full area of said grate mechanism, and a plurality of movable agitator 1116111"? bers positioned beneath said outlets and serving to direct the flow of the fuel from the latterdnto alternate passageways.

3. In a furnace, a fuel receiving hopper carried by said furnace, said hopper being disposed above the grate mechanism of the furnace, aplurality of stationary vertically arranged spaced walls provided in said furnace between said hopper and the fire box of the furnace, said walls being spaced to define fuel passageways, said walls being arranged to provide alternate high and low walls, angular members carried by the higher of said walls and defining substantially restricted outlets in the bottom of said hopper, said outlets being disposed immediately above the lower of said walls and in communication with said passageways, and

a plurality of movable agitator members carried adjacent to the lower of said walls and situated immediately beneath said out lets, said members serving to direct the pas sage of fuel into alternate passageways.

' 1. In a furnace, a sto-ker comprising a hopper arranged above the grate mechanism of the furnace, a plurality of vertically arranged alternate high and low walls provided in said. furnace between "the fire box of the latter and the lower end of said hopper, said walls being relatively spaced to provide intervening fueli passageways, the latter establishing communication between said hopper and the fire box of the furnace, angular walls resting on the upper portions of the higher of said walls and defining re stricted outlets in the bottom of said hopper, said outlets terminating immediately above the lower of said walls, transversely extending agitator members imo-unted forl oscillation immediately above the lower walls, and disposed in co-operation with said outlets, and means for effecting the oscillation of said agitator members, whereby the latter will be actuated toalternately. direct coal from said outletsinto separate passageways. 5. In a furnace provided with a grate, a stoker comprising a fuel receiving magazine 5 being relatively spaced to define intervening fuel passageways, the lower ends thereof being in communication with the fire boX of the furnace, angular walls situated at the lower discharge end of said magazine and 10 defining restricted outlets in the base of the latter, the said outlets being positioned immediately over the upper edges of said vertical Walls, and agitating means movably positioned contiguous to the restricted outlets formed between said angular Walls and 15 serving to direct the fuel issuing from said outlets into said passageways.

Il'ltQStlIIlOIlY whereof I affix my signature.

JOHN J; DERSOM. 

